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Sodium anti-perovskite solid electrolyte compositions

A technology of solid electrolyte and anti-perovskite, applied in the direction of electrolyte, sodium/potassium compound, calcium/strontium/barium compound, etc., can solve the problems of poor machinability and high cost, achieve optimized performance and improve ion conductivity Effect

Inactive Publication Date: 2017-05-31
BOARD OF RGT NEVADA SYST OF HIGHER EDUCATION ON BEHALF OF THE UNIV OF NEVADA RENO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they suffer from several disadvantages such as poor machinability, high cost and flammability

Method used

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  • Sodium anti-perovskite solid electrolyte compositions
  • Sodium anti-perovskite solid electrolyte compositions
  • Sodium anti-perovskite solid electrolyte compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0037] Na 3 Preparation of OCl: Weigh out 0.400g NaOH and 0.585g NaCl and place in N 2 Grind together in air for a few minutes. The resulting fine powder was spread on 0.253 g of Na metal and the mixture was placed in an alumina crucible, which was then sealed in a quartz tube. The sample was first heated to 150°C under vacuum at a heating rate of 1.5°C / min (through the melting point T of Na metal m =97.8°C), and then heated to 350°C at a heating rate of 10°C / min. 1 mol of reactant will release 0.5 mol of H during the heating process 2 , so care and proper handling must be taken when conducting said tests and the total amount of raw material should be well planned. After 3 hours at the highest reaction temperature, the sample was allowed to cool naturally to room temperature. By repeating the milling and heating process 3 times, Na 3 Phase pure powder of OCl. The total synthetic route for a batch of samples took approximately 24 hours.

[0038] Powder X-ray diffraction...

Embodiment B

[0042] Na 3 OBr 0.5 I 0.5 Preparation: Weigh out 0.400g NaOH, 0.515g NaBr and 0.645g NaI and in N 2 Grind together in air for a few minutes. The resulting fine powder was spread on 0.253 g of Na metal and the mixture was placed in an alumina crucible, which was then sealed in a quartz tube. The sample was first heated to 150°C under vacuum at a heating rate of 1.5°C / min (through the melting point T of Na metal m =97.8°C), and then heated to 350°C at a heating rate of 10°C / min. After 3 hours at the highest reaction temperature, the sample was naturally cooled to room temperature. By repeating the milling and heating process 3 times, Na 3 OBr 0.5 I 0.5 phase pure powder. The total synthetic route for a batch of samples took approximately 24 hours.

[0043] Powder X-ray diffraction data were collected at room temperature (25°C). Before measurement, the sample was placed in N 2 Packaged in experimental film (PARAFILM "M") under atmosphere to avoid moisture absorption. ...

Embodiment C

[0045] Na 2.9 Sr 0.05 OBr 0.5 I 0.5 Preparation: Weigh out 0.360g NaOH, 0.515g NaBr, 0.645g NaI and 0.052g SrO and in N 2 Grind together in air for a few minutes. The resulting fine powder was spread on 0.253 g of Na metal and the mixture was placed in an alumina crucible, which was then sealed in a quartz tube. The sample was first heated to 150°C under vacuum at a heating rate of 1.5°C / min (through the melting point T of Na metal m =97.8°C), and then heated to 350°C at a heating rate of 10°C / min. After 3 hours at the highest reaction temperature, the sample was naturally cooled to room temperature. By repeating the milling and heating process 3 times, Na 2.9 Sr 0.05 OBr 0.5 I 0.5 phase pure powder. The total synthetic route for a batch of samples took approximately 24 hours.

[0046] Powder X-ray diffraction data were collected at room temperature (25°C). Before measurement, the sample was placed in N 2 Packaged in experimental film (PARAFILM "M") under atmosph...

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Abstract

Na-rich electrolyte compositions provided herein can be used in a variety of devices, such as sodium ionic batteries, capacitors and other electrochemical devices. Na-rich electrolyte compositions provided herein can have a chemical formula of Na3OX, Na3SX, Na (3-delta) M delta / 2OX and Na (3-delta) M delta / 2SX wherein 0 ;lt; delta & lt; 0.8, wherein X is a monovalent anion selected from fluoride, chloride, bromide, iodide, H-, CN-, BF4-, BH4-, ClO4-, CH3-, NO2-, NH2- and mixtures thereof, and wherein M is a divalent metal selected from the group consisting of magnesium, calcium, barium, strontium and mixtures thereof. Na-rich electrolyte compositions provided herein can have a chemical formula of Na (3-delta) M delta / 3OX and / or Na (3-delta) M delta / 3SX; wherein 0 & lt;delta & lt; 0.5, wherein M is a trivalent cation M+3, and wherein X is selected from fluoride, chloride, bromide, iodide, H-, CN-, BF4-, BH4-, ClO4-, CH3-, NO2-, NH2- and mixtures thereof. Synthesis and processing methods of NaRAP compositions for battery, capacitor, and other electrochemical applications are also provided.

Description

[0001] Statement on Federal Rights [0002] This invention is the result of an academic collaboration between the University of Nevada Las Vegas (UNLV) and Peking University (PKU). The joint efforts of UNLV and PKU professors and postdocs were the key to success. technical field [0003] The present invention generally relates to solid electrolyte compositions and devices such as sodium batteries and capacitors employing Na-rich anti-perovskite compositions. The present invention also relates to methods of synthesis and processing of Na-rich antiperovskite compositions for sodium battery and capacitor applications. Background technique [0004] Batteries with inorganic solid-state electrolytes have many advantages, such as improved safety and cycle efficiency. All solid-state sodium-ion batteries are considered promising for next-generation vehicles and large-scale energy storage. Existing solid electrolytes for sodium batteries are NASICON type ceramics and sulfides. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01G9/025
CPCH01G9/025H01M10/0562H01M10/054C04B35/5152C04B35/62665C04B2235/3201C04B2235/5436C04B2235/768C30B11/00C30B29/12C01D3/00C01D13/00C01F5/00C01F11/00C01G9/006C01G15/006C01P2002/34C01P2002/72C01P2002/88C01P2006/40C01F17/30Y02E60/13Y02E60/10C01F7/78C01B11/062C01B11/064C01B11/20C01B11/22C01D3/04C01P2002/30C01P2002/77C30B11/003H01G9/0036H01G9/032H01M2300/0071H01M2300/008
Inventor 赵雨生王咏刚邹如强
Owner BOARD OF RGT NEVADA SYST OF HIGHER EDUCATION ON BEHALF OF THE UNIV OF NEVADA RENO
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